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BRACHIPOD
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By Tidgy's Dad
Taxonomy
Brachiopod
Kingdom: Animalia
Phylum: Brachiopoda
Class: Rhynchonellata
Order: Rhynchonellida
Family: Rhynchotrematidae
Genus: Rhynchotrema
Species: Rhynchotrema ainsliei
Author Citation N H Winchell, Winchell and Schuchert
Geological Time Scale
Eon: Phanerozoic
Era: Paleozoic
Period: Ordovician
Sub Period: None
Epoch: Middle
Stratigraphy
Galena Formation
Cummingsville Member
Provenance
Acquired by: Purchase/Trade
Dimensions
Length: 1 cm
Width: 1.3 cm
Height: 0.7 cm
Location
Rochester
Minnesota
United States
Comments
Brachiopods, perhaps rhynchonellids most of all, are notoriously hard to identify without their internal features exposed. However, if you know the formation and rough location and have faunal lists it can be possible.
Rhynchonella ainsliei, for example, has 26-34 costae with 5-7 of these appearing on the fold. This specimen has 30 and 5 respectively and is the only species that has so many found in this formation. It also has the correct shape and size to support the match.
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